Wupatkiite from the Cameron Uranium District, Arizona, a new member of the halotrichite group

1995 ◽  
Vol 59 (396) ◽  
pp. 553-556 ◽  
Author(s):  
Sidney A. Williams ◽  
Fabien P. Cesbron
Keyword(s):  
Fibre Axis ◽  
Powder Pattern ◽  
Wet Chemistry

AbstractWupatkiite (Co,Mg,Ni)Al2(SO4)4.22H2O is a new member of the halotrichite group. It occurs 8 miles ESE of Gray Mountain, Arizona, near the prehistoric pueblo dwelling Wupatki. It occurs as cross-fibre veinlets with fibres up to 8mm long. Colour: empire rose (RHS48C), streak white, H. = 1 ½. G = 1.92, D(calc) = 1.87g/cm3. Nonpleochroic with α = 1.477, γ = 1.484, Z^fibre axis = 12°. Wet chemistry gave MgO 1.63, CaO 0.10, MnO 0.17, FeO 0.15, NiO 0.52, CuO 0.12, CoO 3.41, Al2O3 11.30, SO3 35.97, H2O 42.26 (total 95.63%); rem. = montmorillonite and quartz. Parameters refinedo from the powder pattern are close to those of halotrichite. Wupatkiite is monoclinic P21/c with a = 6.189 Å, b = 24.23 Å, c = 21.20 Å, β = 100.33°. Strongest lines are 4.790, 100 (024); 4.295, 27 (140); 3.945, 26 (025); 3.768, 33 (062); 3.494, 92 (124, 063).

Debye equation versus Whole Powder Pattern Modelling: Real versus reciprocal space modelling of nanomaterials

2009 ◽  
Vol 2009 (30) ◽  
pp. 85-90 ◽  
Author(s):  
K. Beyerlein ◽  
A. Cervellino ◽  
M. Leoni ◽  
R. L. Snyder ◽  
P. Scardi
Keyword(s):  
Reciprocal Space ◽  
Powder Pattern ◽  
Equation Versus ◽  
Debye Equation

A wet chemistry method for the analysis of urinary calculi

1983 ◽  
Vol 43 (8) ◽  
pp. 727-733 ◽  
Author(s):  
A. Uldall
Keyword(s):  
Urinary Calculi ◽  
Wet Chemistry ◽  
Chemistry Method

A small bimetallic Ag3Cu2 nanocluster with dual emissions within and against Kasha's rule

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7864-7869 ◽  
Author(s):  
Rajini Anumula ◽  
Pin Xiao ◽  
Chaonan Cui ◽  
Haiming Wu ◽  
Ganglong Cui ◽  
...  
Keyword(s):  
Single Crystals ◽  
One Pot ◽  
Wet Chemistry ◽  
Dual Emissions

Single crystals of a small bimetallic Ag3Cu2 nanocluster protected by six ligands of 2,4-dimethylbenzene thiol are synthesized by a one-pot procedure of wet chemistry.

89 Assessment of NIRS and wet chemistry analytical methods for nutritive value analysis of microwave treated feeds

2021 ◽  
Vol 12 (1) ◽  
pp. 68
Author(s):  
Md Safiqur Rahaman Shishir ◽  
Mian Wu ◽  
Lei Su ◽  
Yu-An Hsu ◽  
Graham Brodie ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Nutritive Value ◽  
Value Analysis ◽  
Wet Chemistry

Spontaneous Exfoliation of Large-Sized Graphene Oxide with Low Defect Concentration by Simple Wet Chemistry

Carbon ◽  
2021 ◽  
Author(s):  
Woo-Jin Lee ◽  
Chan-Soo Kim ◽  
Seung-Yeol Yang ◽  
Dongwook Lee ◽  
Yong-Seog Kim
Keyword(s):  
Graphene Oxide ◽  
Defect Concentration ◽  
Wet Chemistry

Use of TALP with laboratory powder diffraction data from 2D detectors

2013 ◽  
Vol 28 (S2) ◽  
pp. S481-S490
Author(s):  
Oriol Vallcorba ◽  
Anna Crespi ◽  
Jordi Rius ◽  
Carles Miravitlles
Keyword(s):  
Organic Compounds ◽  
Structural Study ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Powder Pattern ◽  
Experimental Setup ◽  
Intensity Data ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Molecular Compounds

The viability of the direct-space strategy TALP (Vallcorba et al., 2012b) to solve crystal structures of molecular compounds from laboratory powder diffraction data is shown. The procedure exploits the accurate metric refined from a ‘Bragg-Brentano’ powder pattern to extract later the intensity data from a second ‘texture-free’ powder pattern with the DAJUST software (Vallcorba et al., 2012a). The experimental setup for collecting this second pattern consists of a circularly collimated X-ray beam and a 2D detector. The sample is placed between two thin Mylar® foils, which reduces or even eliminates preferred orientation. With the combination of the DAJUST and TALP software a preliminary but rigorous structural study of organic compounds can be carried out at the laboratory level. In addition, the time-consuming filling of capillaries with diameters thinner than 0.3mm is avoided.

scholarly journals Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1113 ◽  
Author(s):  
Liuyang Han ◽  
Xingling Tian ◽  
Tobias Keplinger ◽  
Haibin Zhou ◽  
Ren Li ◽  
...  
Keyword(s):  
Cell Wall ◽  
Cell Walls ◽  
Intact Cell ◽  
Nitrogen Adsorption ◽  
Wet Chemistry ◽  
Archaeological Wood ◽  
Waterlogged Archaeological Wood ◽  
X Ray Scattering ◽  
Crystallite Structure ◽  
Cell Wall Mechanics

Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW). Cell wall mechanical properties were examined by nanoindentation without prior embedding. WAW showed more than 25% decrease of both hardness and elastic modulus. Changes of cell wall composition, cellulose crystallite structure and porosity were investigated by ATR-FTIR imaging, Raman imaging, wet chemistry, 13C-solid state NMR, pyrolysis-GC/MS, wide angle X-ray scattering, and N2 nitrogen adsorption. VICWs in WAW possessed a cleavage of carboxyl in side chains of xylan, a serious loss of polysaccharides, and a partial breakage of β-O-4 interlinks in lignin. This was accompanied by a higher amount of mesopores in cell walls. Even VICWs in WAW were severely deteriorated at the nanoscale with impact on mechanics, which has strong implications for the conservation of archaeological shipwrecks.

Structure refinements of Pb2+ ion-exchanged apatites by x-ray powder pattern-fitting

1986 ◽  
Vol 61 (2) ◽  
pp. 230-235 ◽  
Author(s):  
Michihiro Miyake ◽  
Kyoichi Ishigaki ◽  
Takashi Suzuki
Keyword(s):  
Powder Pattern ◽  
X Ray

Wet Chemistry Enriches Iron Ore

1961 ◽  
Vol 53 (11) ◽  
pp. 28A-28A
Keyword(s):  
Iron Ore ◽  
Wet Chemistry

Comparison of Two Dry Chemistry Analyzers and a Wet Chemistry Analyzer Using Canine Serum

1996 ◽  
Vol 25 (1) ◽  
pp. 10-13 ◽  
Author(s):  
Anne Lanevschi ◽  
John W. Kramer
Keyword(s):  
Wet Chemistry ◽  
Canine Serum
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